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Lever locks are way better than the twist locks.

IMO once you have used 2 poles you would not go back to one. One is good for stability when crossing rivers (but not as good as 2) or sidling but does little as far as energy gain goes when walking....

Interesting you don't use the hand loops? They take a huge amount of strain off your hands and wrists. The trick is to put your hands through the loop from the bottom and then hold the strap against...